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Model 90 Output Transformer
rrova
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Posts: 26
Threads: 4
Joined: Feb 2016
City: Nelson State, Province, Country: BC
#13

03-04-2016, 08:53 PM
Yes, the two inner pins are at the bottom (they are labeled with T's & B's in the diagram for Top & Bottom). I agree that chassis and transformer are not wired correctly. I was unaware of the speaker pin wiring convention that you clarified for me, and I appreciate that. Thank you!

I made this rat's nest diagram to help me in identifying the connections as I trace through the circuits (and to make sure I know which tube pin is which). I'm using a signal generator, a 'scope and a signal tracer along with voltage measurements to identify problem areas. With the diagram and the original schematic I can usually keep track of where I am in the circuit analysis. Also, making the diagram helped me to find incorrect values for some components, missing components, and miswired connections.
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Messages In This Thread
Model 90 Output Transformer - by rrova - 03-02-2016, 02:52 AM
RE: Model 90 Output Transformer - by klondike98 - 03-02-2016, 07:07 AM
RE: Model 90 Output Transformer - by morzh - 03-02-2016, 08:29 AM
RE: Model 90 Output Transformer - by Radioroslyn - 03-03-2016, 01:19 AM
RE: Model 90 Output Transformer - by rrova - 03-03-2016, 03:53 AM
RE: Model 90 Output Transformer - by Arran - 03-03-2016, 04:20 AM
RE: Model 90 Output Transformer - by rrova - 03-04-2016, 05:05 AM
RE: Model 90 Output Transformer - by morzh - 03-04-2016, 09:34 AM
RE: Model 90 Output Transformer - by rrova - 03-04-2016, 04:43 PM
RE: Model 90 Output Transformer - by morzh - 03-04-2016, 06:32 PM
RE: Model 90 Output Transformer - by rrova - 03-04-2016, 07:37 PM
RE: Model 90 Output Transformer - by morzh - 03-04-2016, 08:24 PM
RE: Model 90 Output Transformer - by rrova - 03-04-2016, 08:53 PM
RE: Model 90 Output Transformer - by morzh - 03-04-2016, 08:58 PM
RE: Model 90 Output Transformer - by rrova - 03-04-2016, 09:07 PM
RE: Model 90 Output Transformer - by Tubesforme - 03-08-2016, 02:41 PM
RE: Model 90 Output Transformer - by rrova - 03-05-2016, 03:01 AM
RE: Model 90 Output Transformer - by Radioroslyn - 03-05-2016, 07:06 PM
RE: Model 90 Output Transformer - by rrova - 03-05-2016, 07:53 PM
RE: Model 90 Output Transformer - by morzh - 03-05-2016, 07:53 PM
RE: Model 90 Output Transformer - by Radioroslyn - 03-05-2016, 09:35 PM
RE: Model 90 Output Transformer - by morzh - 03-05-2016, 10:15 PM
RE: Model 90 Output Transformer - by rrova - 03-07-2016, 01:47 AM
RE: Model 90 Output Transformer - by morzh - 03-08-2016, 02:51 PM
RE: Model 90 Output Transformer - by rrova - 03-08-2016, 05:17 PM
RE: Model 90 Output Transformer - by Tubesforme - 03-09-2016, 09:59 PM
RE: Model 90 Output Transformer - by rrova - 03-09-2016, 10:04 PM
RE: Model 90 Output Transformer - by Tubesforme - 03-12-2016, 04:47 PM
RE: Model 90 Output Transformer - by Tubesforme - 03-10-2016, 07:35 PM
RE: Model 90 Output Transformer - by morzh - 03-08-2016, 05:50 PM
RE: Model 90 Output Transformer - by rrova - 03-09-2016, 04:33 PM
RE: Model 90 Output Transformer - by morzh - 03-09-2016, 04:39 PM
RE: Model 90 Output Transformer - by morzh - 03-10-2016, 10:33 AM
RE: Model 90 Output Transformer - by morzh - 03-10-2016, 08:19 PM
RE: Model 90 Output Transformer - by rrova - 03-11-2016, 12:06 AM
RE: Model 90 Output Transformer - by morzh - 03-11-2016, 09:36 AM
RE: Model 90 Output Transformer - by Arran - 03-13-2016, 04:31 AM



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